Louisiade whistler

The Louisiade whistler (Pachycephala collaris) is a species of bird in the family Pachycephalidae, which is endemic to the Louisiade Archipelago south-east of New Guinea. It was split from the Bismarck whistler by the IOC in 2015.^[1]

Louisiade whistler
Male illustration by William Matthew Hart
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Pachycephalidae
Genus:	Pachycephala
Species:	P. collaris
Binomial name
Pachycephala collaris Ramsay, 1878
Subspecies
See text

Taxonomy and systematics

It has been variably considered a subspecies of a widespread golden whistler (P. pectoralis) or treated as a separate species, but strong published evidence in favour of either treatment is limited, and further study is warranted to resolve the complex taxonomic situation.^[2]

Subspecies

Two subspecies are recognized:^[3]

• P. c. collaris - Ramsay, 1878: Found in the Louisiade Archipelago except Rossel Island
• P. c. rosseliana - Hartert, 1898: Originally described as a separate species. Found on Rossel Island (Louisiade Archipelago)